JPH01282046A - Tilting device for car headlight - Google Patents

Abstract

PURPOSE:To improve the assembling accuracy and working property of assembly operation by constituting a rotation sensor, detecting a position of an adjusting rod free of longitudinal motion, so as to make it assemblable to a circuit substrate in advance as one integral block via a clip body. CONSTITUTION:In a lamp housing 7 clamped to a car body, there is provided with a tilting device 21 which performs leveling adjustment for a headlight unit 2, and an intermediate part 58 of an adjusting rod 54 is inserted, free of rotation, into a hole 50a of a rod supporter 50 supported on its casing 22 free of slide motion, and the front end is pivotally supported on the unit 2. Then, a rotor 70 as one body with a worm wheel 72 is screwed in a screw shaft part 52 of the rod supporter 50, and rotation of a motor 61 is transmitted via a worm gear 68 or the like. In addition, there is provided with a position detecting sensor 80 for the adjusting rod 54, and this sensor is constituted of a dislike contact holding plate 81 and a sensor gear 85 or the like and fitted in the outside of a clip 90, and a tip part of this clip 90 is engaged with a mounting hole 75 of a circuit substrate 74, thereby having it held in form being attached in between.

Description

DETAILED DESCRIPTION OF THE INVENTION The tilting device for a vehicle headlamp according to the present invention will be explained in accordance with the following items.

A. Field of industrial application B. Overview of the invention C1. Prior art [Fig. 16] a. General background b. Example of a conventional tilting device D. Problem to be solved by the invention [Fig. 16] ゛E4 Solving the problem Means for F Embodiment [Figs. 1 to 15] F-1 First embodiment [Figs. 1 to 12] a. Headlight unit, lamp housing [Figs. 1 to 5] b Rotating fulcrum mechanism [Figure 4 C Aiming adjustment mechanism [Figure 5] d Tilting device [Figures 1 to 4, Figures 6 to 12 d-1, casing [Figure 1, Figures 4, 6, 8 to 11 d-1-a Front half [Figure 1, 4, 8 to 11 d-1-b Rear half [Figure 1] , Fig. 4, Fig. 6, Fig. 7, Fig. 11] d-1-c Connection of both halves d-2, rod support, adjustment rod [Fig. 1, Fig. 4, Fig. 7 to Figure 11 d-3, Drive unit [Figure 1, Figure 8, Figure 9, Figure 11] d-3-a Motor d-3-b, Worm body d-3-c Rotating body, adjustment rod Movement of d-41 Circuit board, harness coat [Fig. 1, Fig. 9, Fig. 11, Fig. 12] d-5 Sensor [Fig. 1, Fig. 9, Fig. 11, Fig. 12] d- 5-a, contact holding plate, sensor gear, conductor support plate d-5-b clip d-5-c contact, coil spring d-5-d, ease of assembly, etc. d-5-e function d-6 aiming Operation mechanism [Fig. 1, Fig. 4, Fig. 6, Fig. 7] d-7 Connection between adjustment rod and headlamp unit [Fig. 1, Fig. 3, Fig. 4] d-8, Operation [Figure 1] d-8-a Aiming d-8-b Leveling F-2 Second embodiment [Figure 13] F-3 Application example [Figures 14 and 15 G Effects of the invention ( A. Field of Industrial Application) The present invention relates to a novel tilting device for a vehicle headlamp. Specifically, a tilting device for a vehicle headlamp, in which a tilting member that is tilted when adjusting the irradiation direction is tiltably supported on a support member;
In particular, it includes an adjustment rod whose front end is connected to the tilting member, a rod support that supports the adjustment rod, a drive unit that moves the rod support in the front and back direction, a circuit board, and the position of the adjustment rod. and a rotation sensor for detecting in cooperation with the circuit on the circuit board, the rotation sensor being disposed coaxially with the adjustment rod, and the positional relationship between the sensor and the circuit board. The accuracy of the sensor can be improved, and there will be no variation in the above positional relationship, and the reliability of the detection operation can be increased.Moreover, the sensor can be easily incorporated. The present invention aims to provide a novel tilting device for vehicle headlights.

(B. Summary of the Invention) The tilting device for a vehicle headlamp of the present invention comprises a tilting member that is tilted when adjusting the irradiation direction in the vehicle headlight device, an adjustment rod connected to the tilting member, and the adjustment rod. A drive unit for moving the rod and a rotation sensor for detecting the position of the adjustment rod in cooperation with a circuit on a circuit board, the rotation sensor being arranged coaxially with the adjustment rod and tilting of a vehicle headlight. The device includes a rotation sensor fitted onto a substantially cylindrical clip body, the clip body attached to a circuit board, and the rotation sensor held in a clamping manner by the clip body and the circuit board. , it is possible to improve the accuracy of the positional relationship between the sensor and the circuit board, and there is no variation in the positional relationship, increasing the reliability of the detection operation. It is designed so that it can be done easily.

(C, Prior Art) [Fig. 16] (a General Background) Vehicle headlamps, such as automobile headlamps, generally undergo initial aiming adjustment, that is, after being assembled to the vehicle body and before use. The headlight unit itself or a reflector (hereinafter referred to as a "tilting" The lamp is provided with a tilting device for tilting the tilting member. Note that the term "headlamp unit" as used herein refers to one in which a light source is disposed within a lighting space defined by a lamp body and a lens covering the front opening of the lamp body.

In addition, the direction of the vehicle headlight may change slightly depending on how the load of people or cargo is applied to the vehicle body, and the irradiation direction for which the initial aiming adjustment was made may be deviated. Some devices are capable of adjusting the irradiation direction that has been deviated each time, that is, leveling adjustment.

A tilting device with such a leveling adjustment function usually includes an adjustment rod whose front end is connected to a tilting member, an aiming manual operating means for moving the adjustment rod so that the tilting member is tilted, and It is equipped with a leveling drive unit and a sensor for detecting the position of the adjustment rod when it is moved by the drive unit, and the sensor is arranged coaxially with the adjustment rod in order to reduce the size of the device. Some examples of tilting devices with such a structure include:
Tokukai Showa 5! There is a lt-209932 publication.

(b. An example of a conventional tilting device) FIG. 16 shows a tilting device for a vehicle headlamp described in the above-mentioned Japanese Unexamined Patent Publication No. 59-209932. In the figure, a is a headlamp unit that is supported by a lamp housing (not shown) fixed to the vehicle body so as to be tiltable in the horizontal and vertical directions via one rotation fulcrum and two adjustment points, and b is the above-mentioned 2. This is a tilting device provided at an adjustment point for tilting in the vertical direction among the two adjustment points.

C is a casing fixed to the lamp housing, d is a worm wheel meshed with a worm gear f rotated by a motor e, and g is non-rotatably supported by the casing C and is screwed into a dovetail hole in the worm wheel d. A cylindrical rod support body 1 is moved in the front-rear direction by the rotation of a worm wheel d, the middle part of which is screwed into the dovetail hole j of the rod support body g, and the front end part k or the headlight unit a. It is an adjustment rod that is connected to the lower end part C in a ball joint shape and protrudes rearward from the rear end m or casing C. To make the initial aiming adjustment, grasp the rear end m and rotate the adjustment rod i. Also, when performing leveling adjustment, motor e is driven. That is, when the adjusting rod i is rotated, the adjusting rod i is screwed into or unscrewed from the rod support g, thereby moving in the front-back direction, and the motor e is driven to move the ohm wheel d. When rotated, the rod support g is moved in the front-rear direction together with the adjustment rod l, and as the adjustment rod i moves in the front-rear direction in this way, the headlight unit a is tilted downward on the road. The irradiation direction will be adjusted accordingly.

n is a circuit board placed at the rear end inside the casing C;
0 is a large number of spherical contacts p, p,... arranged in a ring.
The contact holding plate 0 and the rotating plate q are formed with conductors r and r on the surface facing the contacts p, p, ..., and these contact holding plate 0 and rotating plate q face each other in the front and back direction. The contact holding plate O is positioned with respect to the circuit board n, and the rotary plate q is rotatably supported by a support portion S protruding from the inner surface of the casing C. These contact holding plates O1 contacts p, p, ・
..., a rotating plate q, etc. constitute a rotation sensor t. A portion of the adjustment rod 1 is inserted through a hole U of the circuit board n, and the rotation of the worm wheel d is transmitted to the rotary plate q via a transmission gear V.

When the worm wheel d rotates, the adjustment rod i moves and the rotating plate q rotates, so that its conductors r,
The contact positional relationship between r and the contacts p, p, . . . changes, and thereby the position of the adjustment rod 1 is detected.

(D Problem to be Solved by the Invention) [Fig. 16] According to such a tilting device, the sensor t for detecting the position of the adjustment rod is arranged coaxially with the adjustment rod i. Since the sensor t is not located so as to protrude laterally from the adjustment rod i, the adjustment rod i and the sensor t can be arranged together in a compact manner.

However, the sensor t in this tilting device is supported by the contact holding plate 0 or the circuit board n, which is one of the two members that make up this device, and the sensor t is supported by the rotary plate q or the support portion S of the casing C, which is the other member. Since the contact holding plate 0 and the rotary plate q are supported, it is difficult to obtain accurate positional relationships between them, and in particular, variations tend to occur in the opposing gaps in the axial direction. There is a problem that they often do not match, and therefore it is difficult to obtain stable operating characteristics.

Further, the contact holding plate 0 is supported by the circuit board n, and the rotating plate q
are supported by the support part S of the casing C, so it takes a lot of effort to assemble them, especially when the contact holding plate 0 and the rotary plate q are made to face each other, the contacts p, p,... The assembly work is extremely troublesome because the work must be done carefully to prevent it from falling off.

(E. Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the tilting device for a vehicle headlamp of the present invention has a substantially cylindrical shape and a bulge extending laterally at the base end. A sensor is rotatably disposed on the lip body, which is provided with a projecting part and whose tip part has elasticity to bend in a direction perpendicular to the axial direction, and the tip part of the clip body is inserted into the mounting hole of the circuit board. By being engaged, the sensor is held in a clamp-like manner by the circuit board and the protrusion, and the adjustment rod is inserted through the clip body.

Therefore, according to the tilting device for a vehicle headlamp of the present invention, the rotation sensor can be assembled in advance to the circuit board as one unified block via the clip body, regardless of the number of components composing the rotation sensor. Therefore, the relative positional relationship of each part is always regulated to be constant, and the accuracy of the positional relationship is high, and the assembly work can be performed extremely easily.

(F. Embodiment) [FIGS. 1 to 15] Details of the tilting device for a vehicle headlamp of the present invention will be described below according to the illustrated embodiments.

(F-1. First Embodiment) [Figs. 1 to 12] Figs. 1 to 12 show a first embodiment of a tilting device for a vehicle headlamp according to the present invention. The headlight device 1 shown in this embodiment is a so-called unit movable type headlight device.
That is, a headlight unit consisting of a light bulb arranged in a light space defined by a lamp body having a reflective mirror surface and a lens covering the front opening of the lamp body is used as a tilting member, and this headlight unit is tilted toward the vehicle body. This is a type of headlight device that changes the irradiation direction by tilting.

(a Headlamp unit, lamp housing) [Figures 1 to 5 2 show a headlamp unit, which includes a lamp body 3 formed in a concave shape that opens approximately forward, and the lamp body 3. It consists of a lens 4 attached to a body 3 so as to cover its front opening, and a light bulb 5 supported by the lamp body 3.

The lamp body 3 has a reflective surface 3a facing forward, the light bulb 5 is supported in a light bulb mounting hole 3b formed at the top of the reflective surface 3a, and the light emitting part of the light bulb 5 is connected to the lamp body 3. It is located within a lamp space 6 defined by a lens 4.

Reference numeral 7 denotes a lamp housing made of synthetic resin, which has a substantially concave shape with an opening toward the front, and is fixed to the vehicle body 8 so as to be located on the rear side of the headlight arrangement opening of the vehicle body 8.

Point A, point B, and point 6 (see Figure 2) are headlight unit 2.
is the point supported by the lamp housing 7, point A is the rotation fulcrum, and point B and A are spaced laterally from point A.
Six points spaced downward from the point are adjustment parts that can adjust the distance between the headlight unit 2 and the lamp housing 7, and the headlight unit 2 is adjusted by these adjustment parts. By doing so, it can be tilted in the left-right direction (the direction toward the left in FIG. 2 is defined as the left side, and the direction toward the right is defined as the right side) and in the vertical direction.

(b Rotation fulcrum mechanism) [Fig. 4] Reference numeral 9 denotes a rotation fulcrum mechanism constituting the above-mentioned rotation fulcrum portion.

Reference numeral 10 denotes a supported part that protrudes rearward from the rear surface of the lamp body 3. A metal support shaft 11 is fixed to the rear end of the supported part, and a spherical part 11a is attached to the lower end of the support shaft 11. It is formed in one piece.

Reference numeral 12 denotes a synthetic resin receiver mounted so as to protrude forward from the lamp housing 7, and an open spherical recess 12a is formed on the upper surface of the receiver.
The ball portion 11a of the support shaft 11 is rotatably fitted into the support shaft 2a.

Thus, the headlamp unit 2 has the ball portion 11a of the support shaft 11.
is supported by the receiver 12 (this point is the above-mentioned point A).

) is supported by the lamp housing 7 so as to be tiltable about the center of rotation.

(c. Aiming Adjustment Mechanism) [Fig. 5] Reference numeral 13 indicates an aiming adjustment mechanism that constitutes the adjustment section for the point B.

Reference numeral 14 denotes a substantially cylindrical protrusion that protrudes rearward from the rear surface of the lamp body 3, and a synthetic resin receiver 15 is supported at its rear end. A spherical recess 15a that opens toward the front and a clear hole 15b that continuously extends forward are formed at the front end of the spherical recess 15a.

A gear unit 16 includes a gear case 17 fixed to the front surface of the lamp housing 7, a first bevel gear 18 rotatably provided in the gear case 17 with its axial direction extending along the vertical direction, and the first bevel gear 18. It consists of a second bevel gear 19 that meshes with the bevel gear 18 and an aiming adjustment shaft 2o, and a dovetail hole 19a that penetrates a boss formed in the center of the second bevel gear 19 in the front-rear direction.
is formed, and the upper end of the operating rod 18a fixed to the first hevel gear 18 protrudes outside the gear case 17.

Most of the aiming adjustment shaft 20 has a spiral shape, and has a ball portion 20a and a plate-shaped protrusion 20b protruding forward from the ball portion 20a integrally formed at its front end. is screwed into the dovetail hole 19a of the second bevel gear 19, the spherical portion 20a is rotatably fitted into the spherical recess 15a of the receiver 15, and the protrusion 20. b or the above receptor 1
It is slidably engaged with the hole 15b of No. 5.

Therefore, the aiming adjustment shaft 20 is connected to the receiver 15 in a non-rotatable manner. The adjustment point B is the connection point between the spherical portion 20a and the spherical recess 15a.

Thus, the first bevel gear 18 is rotated by the operation shaft 18a.
When rotated, the second hevel gear 19 is rotated, and the aiming adjustment shaft 20 screwed into the second hevel gear 19 is sent in the axial direction, so that the receiver 15 is moved approximately in the front-rear direction, This causes the headlamp unit 2 to
The irradiation direction is changed to the left and right by tilting approximately in the left and right directions using the straight line connecting the point and the zero point as the center axis of rotation. That is, aiming adjustment is made in the left and right directions.

(d Tilt device) [Figures 1 to 4, Figures 6 to 1
FIG. 2] Reference numeral 21 denotes a tilting device constituting an adjustment section for the support point C. Aiming adjustment and leveling adjustment in the vertical direction of the irradiation direction of the headlamp unit 2 are performed by this tilting device 21.

This tilting device 21 includes an adjustment rod connected to the headlamp unit 2, a rod support supporting the adjustment rod, a drive unit for moving the rod support, and adjustment when moved by the drive unit. It consists of a sensor for detecting the position of the rod, an aiming adjustment mechanism for manually rotating the adjustment rod, etc.

(d-1, casing) [Fig. 1, Fig. 4, Fig. 6,
The casing 22 in FIGS. 8 to 11 is a casing that can be divided into approximately two parts.
It consists of a front half 23 and a rear half 24 made of synthetic resin.

(d-1-a Front half) [Figures 1, 4, 8 to 11] The front half 23 is formed into a dish-like shape with an open rear surface and a vertically elongated rectangular shape, and its lower end The depth of this section is approximately half the depth of the remaining section, and the cylindrical support tube 26 is located so as to penetrate the upper end portion of the front wall 25 in the front-rear direction, the front end of the upper surface, and approximately the lower surface. Mounting pieces 27, 27, 27 protruding from the center are integrally formed, and the support tube 2
The rear end of the front half 6 extends to approximately the middle of the thickness of the front half 23. Further, the hole 28 of the support tube 26 has a front end portion formed to have a slightly smaller diameter than the remaining portion, and engagement grooves 28a, 28a extending in the axial direction above and below the inner circumferential surface of the portion excluding the front end portion.
or is formed.

29. 29. 29 is an engaging protrusion that protrudes outward from a position approximately in the middle between the front end and the front wall 25 on the outer peripheral surface of the support cylinder 26.

30.3o, . . . are thick walled portions formed at four corners of the inner surface of the front half 23, and these thick walled portions 30.3
0.30, . . . are formed with tapping holes 30a, 30a, . . . opened on the rear surface.

The front half 23 has a circular motor support protrusion 31 formed at a position near the lower end of the left inner surface thereof, and a motor support piece protruding rearward from a position near the right end of the front wall 25. 32 is formed, and the motor support piece 32
A substantially U-shaped notch 32a opening at the rear edge is formed at the rear edge, and the notch 32a faces the motor support protrusion 31.

33.33.33 are worm support parts arranged in a row in the left and right direction, and two of these three worm support parts 33.33.33 are on the left and right sides of the front half 23.
The other ohm support portion 33 is formed at a position approximately midway in the height direction of the two inner surfaces of the front wall 25, and the other ohm support portion 33 is provided to protrude rearward from a position slightly to the left of the center portion of the front wall 25. Approximately U-shaped notches 33a, 33a, 33a are formed in these ohmic support portions 33, 33, 33 and open at the rear edge.

Reference numeral 34 denotes a support protrusion for supporting a gear support bin, which will be described later, and is provided protruding rearward from a position of the front wall 25 that is close to the support tube 26 from the diagonally lower left side.
A support hole 34a extending along the front-rear direction is formed at the rear of the support protrusion 34.

(d-1-b Rear half) [Figures 1, 4, 6, 7, 11] The rear half 24 has a substantially rectangular dish shape with an open front, and the rear half 24 has a substantially rectangular plate shape with an open front. A lower portion 36 of the wall 35 projects rearward, and recesses 37, 37, .
Terminal insertion hole 38a, in the back wall 38, 38,...
38a, . . . are formed.

Further, a rod insertion hole 39 is provided approximately at the center of the upper part of the rear wall 35.
are formed, and annular protrusions 40.41 are formed on the front and rear surfaces of the rear wall 35 so as to surround the insertion hole 39, and the protrusions 40.41 on the front side of these protrusions 40.41 are formed on the front and rear surfaces of the rear wall 35.
0 has an inner diameter approximately twice that of the rod insertion hole 39, and the protrusion 41 on the rear side has an inner diameter nearly twice the inner diameter of the protrusion 40 on the front side.

42, 42, . . . are mounting bosses for mounting an aiming operation mechanism, which will be described later, and are approximately cylindrical in shape and extend rearward from a position in contact with the annular protrusion 41 at the upper part of the rear wall 35. Protruding tapping holes 42', 42', . And these four wooden mounting bosses 42.4
2, . . . are located separately at each of the four corners of the square, and two adjacent ones are arranged in a horizontal or vertical direction.

43, 43, . . . are screw insertion holes formed by penetrating in the front-rear direction thick wall portions (not shown) formed at four corner portions of the inner surface of the rear half 24.

44. 44 are worm support pieces formed on the left and right inner surfaces of the rear half 24 at positions corresponding to the two left and right ends of the worm support portions 33, 33, and 33 formed on the front half 23, respectively; Its front end protrudes slightly forward from the front surface of the rear half 24, and cutouts 44a, 44a that are approximately arcuate when viewed from the side are formed in the front end surface.

Reference numeral 45 indicates a support protrusion protruding forward from the rear wall 35, and reference numeral 46 indicates a motor holding protrusion protruding forward from the rear wall 35.
A support hole 45a is formed in the front end surface of the support protrusion 34 corresponding to the support protrusion 34 of No. 3, and the motor holding protrusion 46 is located approximately in the middle between the center and the lower end of the back surface M35. It is located in

(d-1-c, Joining both halves) The front half 23 and the rear half 24 are inserted into the screw insertion holes 43, 43, . . . of the rear half 24 with their openings abutted against each other. The tapping screws 47, 47, . . . inserted from the rear are screwed into the pre-tapping holes 30a, 30a1, .
is formed.

When both the front and rear halves 23 and 24 are combined, the support tube 26 of the front half 23 and the rod insertion hole 39 of the rear half 24 are located coaxially, and the support protrusions 34 and 45 are coaxially located. worm support portion 33 of the front half 23
．． The two rear ends on both the left and right ends of 33.33 and the front ends of the worm support portions 44.44 of the rear half 24 are close to each other and face each other.

Incidentally, such a casing 22 is attached to the lamp housing 7 through a mounting hole 48 formed in the lamp housing 7 where the front end of the support tube 26 is opposite to the right end of the lower end of the headlamp unit 2. Engagement protrusions 29, 29, which protrude inward and are then formed on the support cylinder 26.
29 passes into the lamp housing 7 through a notch (not shown) formed at the edge of the mounting hole 48, and by slightly rotating the casing 22 here, the engaging protrusion 29.2
9.29 is engaged with the front opening edge of the mounting hole 48, and is further engaged with the front wall 25 of the casing 22 and the lamp housing 7.
With the O-ring 49 inserted between the
It is supported by the lamp housing 7 by fixing the mounting pieces 27, 27, and 27 of No. 3 to the lamp housing 7 with bolts and nuts.

(d-2 Rod Support, Adjustment Rod) [Figs. 1, 4, 7 to 11] 50 is a rod support made of synthetic resin.

The rod support body 50 has a substantially cylindrical shape that is long in the front-rear direction,
The approximately middle part 51 is the thickest, the part in front of the middle part 51 is the next thickest, and the rear part is the thinnest. It is considered to be the shaft. The intermediate portion 51 has approximately the same diameter as the diameter of the hole 28 of the support tube 26 of the casing 22 other than the front end, and is provided with an engaging protrusion 53 on the opposite side across the axis.
53 is provided protrudingly.

Incidentally, the spiral groove formed in the spiral shaft portion 52 is formed in a so-called trapezoidal spiral groove shape.

The rod support 50 has an intermediate portion 51.
and the front portion thereof are inserted into the support tube 26 so as to be in sliding contact with the inner peripheral surface of the hole 28 of the support tube 26, and the engaging protrusion 53.
53 is slidably engaged with the engagement grooves 28a, 28a formed in the hole 28, whereby the rod support 50
is supported by the casing 22 in a non-rotatable and axially movable state.

54 is a metal adjustment rod. The adjustment rod 54 has a cylindrical shape with a length approximately three times that of the rod support 50, and a front portion 55 having a length of about one-third of the total length is formed into a spiral shaft. A flange-shaped stopper 56 is formed at a position approximately in the middle of the rear portion from 55, and a rear end portion 57 is formed to have a generally oval shape when viewed from the axial direction. Reference numeral 58 represents an intermediate portion between the front portion 55 and the stopper 56, and 59 represents an annular groove formed at the boundary between the intermediate #S58 and the front portion 55.

The adjustment rod 54 is rotatably inserted through the intermediate portion 58 or the hole 50a of the rod support 50, and the stop washer 60 and the stopper 56, which are engaged in the groove 59, are attached to the front and rear of the rod support 50. By coming into contact with both end surfaces, it is impossible to drive the rod support 50 in the axial direction.

(d-3 drive unit) [Fig. 1, Fig. 8, Fig. 9, Fig. 11] (d-3-a, motor) 61 is a DC motor, which is approximately oval-shaped when viewed from the axial direction. A case 62 having a length approximately two-thirds of the width of the casing 22 is provided, and protrusions 63 and 63 are protruded from the center of both end surfaces of the case 62.

Further, 64 is a rotating shaft of the motor 61, and its case 6
A pinion gear 65 is fixed to a portion protruding from 2.

The motor 61 has an axial direction extending in the left-right direction, and is disposed at a position offset toward the front wall 25 in a portion of the casing 22 near the lower end. That is, one of the protrusions 63.63 of the motor 61 is fitted into the motor support protrusion 31 formed on the front half 23, and the other protrusion 63 is fitted into the notch 3 of the motor support piece 32 of the front half 23.
2a, and is further supported by the casing 22 by a motor holding protrusion 46 provided on the rear half 24 lightly contacting the casing 62 from behind, and the pinion gear 65 is engaged with the right side wall of the front half 23. and the motor support piece 32.

(d-3-b worm body) 66 is a worm body. 67 is the main part of the main body 66, which is approximately cylindrical in shape and has a length approximately equal to the distance between the left and right side walls of the casing 22, and the approximately half portion that is biased towards the left end side is the main part of the main body 66. It is slightly thicker than the remaining part, and is the part excluding the left end of this thickened part, and is an ohm gear 68, and is a spur gear shaped with the left end of the larger part as the center. A transmission gear 69 is also formed.

The worm body 66 has both ends of its main portion 67 attached to the worm support portion 3 formed on the front half 23.
It is rotatably supported by the notches 33a, 33a, 33a of 3.33. It is meshed with a pinion gear 65 fixed to.

Thus, the ohm gear 68 is arranged parallel to the motor 61, and the rotation of the motor 61 is transmitted via the transmission gear 69.

(d-3-c Movement of rotating body and adjustment rod) 70 is a rotating body, which has a substantially cylindrical boss portion 71 and a boss portion 71.
Worm wheel 72 centered on the part near the rear end
are integrally formed of synthetic resin, and the boss portion 71
A dovetail hole 71a is formed in the dovetail hole 71a, and the dovetail hole 71a has a trapezoidal dovetail groove.

73 is a gear portion formed on the outer peripheral surface of the rear end portion of the boss portion 71.

The rotating body 70 has a front end half of the boss portion 71 rotatably fitted into the hole 28 of the support tube 26 of the casing 22, and a rear end surface is brought into contact with a clip to be described later, so that it can be rotated in the axial direction. Movement to is blocked.

Therefore, the worm wheel 72 is disposed above the case 62 of the motor 61 with the worm body 66 in between, and is meshed with the worm wheel 72.

Further, the threaded shaft portion 52 of the rod support body 50 described above is screwed into 71a of the rotating body 70.

Thus, the pinion gear 65, the worm body 66, and the rotating body 70 constitute a drive unit. When the motor 61 rotates, the rotation is transmitted to the rotating body 70 via the pinion gear 65 and the ohmic body 66. Since the rotating body 70 cannot be moved in the axial direction, the rod support 50 screwed onto the rotating body 70 is moved in the axial direction, and the adjusting rod 54 is integrally moved in the front-rear direction. It will be moved.

(d-4 circuit board, harness coat) [Fig. 1, Fig. 9, Fig. 11, Fig. 12 The core 4 is a circuit board, and is located at a rearward position inside the rear half 24 and is oriented in the front-rear direction. A circular clip fastening hole 75 is formed between the center and the upper end, and through holes 76, 76, . . . are arranged in the left-right direction at the lower end. The support protrusion 45 and the motor holding protrusion 46 protruding from the rear wall 35 of the rear half 24 are passed through insertion holes 77 and 77' formed in the circuit board 74. □ 78.78,... is a harness coat (see Figure 1) with one end connected to a power supply and remote control unit, etc. (not shown).
In the drawing, only one tree is shown. ), 79.79,...
are connecting terminals (also only one is shown in Fig. 1), and the connecting terminals 79, 79, . . . have extremely thin sleeve-shaped soldering portions 79a, 79a, . The soldering parts 79a, 79a, . . . thicker cord holding part 7
9b, 79b, . . . are integrally formed of a conductive material, and the portions other than the tip portions of the soldered portions 79a, 79a, . Anti-soldering portions 79 of holding portions 79b, 79b, . . .
A, 79a, . . . have small clamping pieces 79c, 79c, . . . that protrude from the edge toward the axis. And harness code 78.78. . . ., the tip of the outer sheath 78a, 78a, . . . is the cord holding portion 7.
9b, 79b, ... and the outer sheath 78a,
Core wires 78b, 78b exposed from the tips of 78a, . . .
, . . . are inserted into the soldering portions 79a, 79a, . . . , and the connection terminals 79, 79, .
The soldering portions 79a, 79a1, . . . are attached to the recesses 37.37, .
37, . . . are inserted into the terminal insertion holes 38a, 38a, . . . formed in the back walls 38, 38, . . . and through holes 76, 76, . The connecting terminals 79, 79, . . . are inserted into the recesses 37, 37, .
・The outer sheaths 78a, 78a1... are bitten and held, and the soldered parts 79a, 79a, . . . or the core wire 78b
, 78b1 . . . are held in a hook-like manner.

Then, the tips of the soldering parts 79a, 79a, . The harness coats 78.78, . . . are connected to the connection terminals 79.7 fixed to the circuit board 74 in this way.
9, . . . are connected to the circuit on the circuit board 74.

(d-5 sensor) [Figure 1, Figure 9, Figure 11, Figure 1
FIG. 2] 80 is a sensor for detecting the position of the adjustment rod 54 in cooperation with the circuit on the circuit board 74.

(d-5-a Contact holding plate, sensor gear, conductor supporting plate) 81 is a thick disc-shaped contact holding plate, with a circular support hole 82 formed in the center and a part near the outer periphery. A large number of contact holding holes 83, 83, . Positioning protrusions 84.84 are provided in a protruding manner.

Reference numeral 85 designates a sensor gear shaped like a lattice gear. A circular support hole 86 is formed in the center of the sensor gear, and the front end 86a of the support hole 86 has a larger diameter than the remaining part. A shallow annular recess 87 coaxial with the support hole 86 is formed.

Reference numeral 88 denotes a substantially ring-shaped conductor support plate, and two substantially semicircular band-shaped conductors 89 and 89' are formed on the rear surface of the plate, and the substantially front half of the plate in the thickness direction corresponds to the recess 87 of the sensor gear 85. It is fitted into the gear 85 and fixed to the gear 85 by fixing means such as adhesive.

(d-5-b Clip) Reference numeral 90 is a clip made of synthetic resin, in which a substantially cylindrical main portion 91 and a flange 92 protruding outward from the front end of the main portion 91 are integrally formed. The rear half of the main part 91 has grooves 93, 93, which reach the rear end in this part.
By providing . . . , a plurality of elastic pieces 94, 94, . Engagement projections 95, 95, . . . are formed on the engagement projections 95, 95, .
．． 95, . . . rear surface 95a.

95a, . . . are slopes that move toward the front as they move toward the outer ends.

The outer diameter of the main part 91 is the same as that of the contact holding plate 81 and the sensor gear 8.
The outer diameter of the flange 92 is approximately the same as the diameter of the support holes 82 and 86 of the sensor gear 85 and the diameter of the clip attachment hole 75 of the circuit board 74. It is formed to have approximately the same size as the inner diameter of.

Then, the main portion 91 of the lip 90 is inserted into the support hole 86 of the sensor gear 85, the support hole 82 of the contact support plate 81, and the clip engagement hole 75 of the circuit board 74 from the front side in this order.

At this time, the elastic pieces 94, 94, . . .
5.95, . . . slopes 95a, 95a, . . . are the support holes 86 of the sensor gear 85 and the support holes 8 of the contact holding plate 81.
2. By hitting the opening edge of the clip attachment hole 75 and being pressed relatively toward the axis, the main portion 91 is bent to reduce its diameter, and in this state, the main portion 91 is bent toward the hole 86.82.7.
5, etc., and the engaging protrusions 95.95, . ,...
• is engaged with the rear opening edge of the clip engagement hole 75. The flange 92 of the clip 90 is located within the large diameter portion 86a of the support hole 86 of the sensor gear 85.

Thus, the contact holding plate 81 and the sensor gear 85 are held by the flange 92 of the clip 90 and the circuit board 74 in a clamping manner while being coaxially fitted onto the main portion 91 of the clip 90 . The sensor gear 85 is rotatable relative to the clip 90, and the contact holding plate 81 has its positioning protrusions 84, 84 located in positioning holes 96.84 formed near the clip engagement holes 75 of the circuit board 74. The position and orientation with respect to the circuit board 74 are determined by being fitted into the hole 96 .

(d-5-c Contacts, coil springs) 97.97, . . . are spherical contacts, which are stored one by one in the contact holding holes 83, 83, . There is.

98, 98, . . . are coil springs, which are housed one by one in the contact holding holes 83, 83, .
．． 97, . . . and terminals 99, 99, . It has been reduced.

Therefore, the contacts 97.97, . . . are connected to the coil springs 98.
Terminal 99 on circuit board 74 by 98, .
．． 99, . . . and is always in elastic contact with the rear surface of the conductor support plate 88 fixed to the sensor gear 85, that is, the surface on which the conductors 89, 89' are provided. .

In addition, these contacts 97, 97, ... and coil springs 98
．． 98, . . . are contact holding holes 83, 83, . . . of the contact holding plate 81 before the clip 90 is attached to the circuit board 74.
・It is stored in.

(d-5-d, ease of installation, etc.) In this way, the sensor 80 has the contact holding plate 81 and the sensor gear 85 fitted onto one clip 90, and the clip 90 is attached to the circuit board 74. Since the predetermined components are assembled to each other by being fixed to the predetermined positions of , unlike the sensor t in the conventional vehicle headlamp tilting device, there is no need to separately support the components and then make them face each other, so the assembly work is extremely easy and the yield rate is also reduced. improves.

(d-5-e Function) Reference numeral 100 denotes a gear support shaft, and its part excluding the middle part rotates in the support holes 34a and 45a of the support protrusions 34 and 45 provided in both the front and rear halves 23 and 24 of the casing 22. Possibly supported.

101 is an intermediate gear, which includes a large gear 101a and a small gear 10.
1b are integrally formed. The intermediate gear 101 is fixed to the intermediate portion of the gear support shaft 100, the large gear 101a meshes with a gear portion 73 formed on the boss 71 of the rotating body 70, and the small gear 101b meshes with the sensor gear 85. are engaged.

Therefore, when the rotating body 70 rotates, the intermediate gear 101 also rotates, causing the sensor gear 85 to rotate.
Thereby, the contacts 97, 97, . . . of the conductors 89, 89' of the conductor support plate 88 fixed to the sensor gear 85,...
The position relative to will change.

The contacts 97, 97, . The two electrode terminals 99a and 99b are respectively connected to two input terminals with different polarities of the motor 61, and the other contacts are switching contacts of two mutually interlocking rotary switches provided on the remote control unit. The rotary switch is connected to a power source battery, and by selecting an arbitrary set of switched contacts in this rotary switch, the selected set of switched contacts and this Two connected contacts 97.9
7, the conductor 89, 89', the motor 61, and the power source are closed so that the motor 61 can be rotated forward or reverse.

When the motor 61 rotates, the rotating body 70 also rotates, so that the rotating body 70 drives the rod support 50 and the adjustment rod 54 integrally forward or backward, and at the same time, the sensor gear 85 and the conductor When the support plate 88 is rotated by a predetermined amount, the conductors 89, 89' are separated from the selected contacts 97 and 97, opening the circuit described above and stopping the rotation of the motor 61. Therefore,
The amount and direction of rotation of the motor 61 are determined by the switched contact selected by the rotary switch, and the position of the adjustment rod 54 is detected by the sensor 80.

The control system of the control mechanism including such a sensor 80 is substantially the same as the control system of the control mechanism disclosed in Japanese Patent Application Laid-Open No. 59-209932.

(d-6, Aiming operation mechanism) [Fig. 1, Fig. 4,
6 and 7 is an aiming operating mechanism provided on the rear surface of the casing 22, and the adjustment rod 54 is rotated by this operating mechanism 102.

103 is a case, 104 is a base of the case 103, and the base 104 is opened toward the rear, and a coupling flange 105 is integrally formed along the edge of the opening. A circular opening 106 is formed in the front plate portion 104a. Also, 107 is case 1
The outer circumference of the cover 107 is approximately the same as the outer circumference of the flange 105 of the base 104, and its central portion protrudes rearward in a substantially dome shape. Thus, the lid 107 and the base 104 are overlapped so as to close the opening of the base 104.
04 are coupled by a coupling means (not shown), thereby forming the case 103.

108 is an operating axis. The operating shaft 108 is formed into a substantially bolt shape, and a bevel gear 109 is fixed to the tip thereof. 110 is a fitting protrusion formed on one end surface of the bevel gear. The operating shaft 108 is rotatably supported at a substantially middle portion thereof in the axial direction in an operating shaft insertion hole 111 formed on one side of the case 103, and the fitting protrusion 110 of the hevel gear 109 is connected to the case 103. A fitting part 112 formed to protrude outward on the other side of 103
It is rotatably fitted inside.

113 is an adjustment rod rotor. Reference numeral 114 denotes a shaft portion of the adjustment rod rotor 113. The shaft portion 114 is formed into a substantially cylindrical shape with a closed rear end, and the cross-sectional shape of the hole 115 is substantially oval-shaped. Reference numeral 116 denotes a substantially hebbel gear-shaped meshing portion that is integrally formed on the rear half of the outer circumferential surface of the shaft portion 114. Therefore, the adjustment rod rotor 113 has its shaft 44 .
The operating shaft 108 is inserted into the opening 106 formed in the case 103 from the inside of the case 103, and the engaging part 116 is positioned so that its front surface substantially contacts the front plate part 104a of the case 103. bevel gear 1 fixed to
It is meshed with 09'.

The operating shaft 108 and the adjusting rod rotor 113 are moved to the above-described positions by the bevel gear 109 fixed to the operating shaft 108 and the bevel gear-shaped meshing portion 116 of the adjusting rod rotor 113 meshing with each other. is maintained.

Thus, the case 103 has two parallel parts of the case 103 with the rear end 57 of the adjustment rod 54 slidably inserted into the hole 115 of the shaft 114 of the adjustment rod rotor 113 provided therein. Tapping screw 118.1 inserted into insertion hole 117.117 formed in one side end
18 is fixed to the casing 22 by being screwed into two tapping holes 42', 42' located diagonally to each other in the four mounting bosses 42, 42, . . . provided on the casing 22. and its orientation is determined by which of the mounting bosses 42, 42, . . . is used. That is, the four wooden mounting bosses 42, 42, . . .
If two mounting bosses 42a and 42b are used, which are arranged diagonally downward to the left when viewed from the rear, the portion of the operating shaft 108 protruding from the case 103 will be removed as shown by the solid line in FIG. The operation shaft 108 is mounted in a direction in which it protrudes diagonally downward to the right when viewed from the rear from the case 103, or conversely, in a direction in which it protrudes diagonally upwardly to the left as viewed from the rear. Boss 42.
42, . . , which are arranged diagonally downward to the right when viewed from the rear, the operation shaft 108 is connected to the case as shown by the two-dot chain line in FIG. The operating shaft 108 protrudes diagonally downward to the left when viewed from the rear from the case 103, or vice versa.
It is attached so that it protrudes diagonally upward to the right when viewed from the rear. Therefore, the aiming operating mechanism 102 can be attached in any of the four directions mentioned above, and the operating shaft 108 can be most easily operated from among the directions that do not interfere with surrounding members. You can choose the orientation and install it.

Note that 119 is a ring-shaped sealing material that is fitted into the annular protrusion 41 formed on the rear surface of the rear half 24, and the sealing material 119 provides a seal between the front surface of the case 103 and the rear surface of the casing 22. kept watertight.

Further, a portion of the adjustment rod rotor 113 that protrudes forward from the case 103 is rotatably fitted into the hole of the sealing material 119.

Thus, when the operating shaft 108 is rotated, the heher gear 109 integrated therewith rotates the adjusting rod rotor 113, so that the adjusting rod 54 is rotated.

(Connection of d-7 adjustment rod and headlight unit) [1st
120 is a bracket protruding from the lower end of the back surface of the lamp body 3 of the headlamp unit 2, and a nut 121 made of synthetic resin is attached to the bracket 120. The front end of the adjustment rod 54 is screwed into this nut 121.

(d-8 operation) [Figure 1] Aiming adjustment and leveling adjustment by the leveling adjustment 21 as described above are performed as follows.

(d-8-a, Aiming) When performing initial aiming, the operating shaft 108 of the aiming operating mechanism 102 is rotated.

When the operation shaft 108 rotates, the adjustment rod 54 is rotated as described above, so that the adjustment rod 54 is connected to the nut 1.
21, but in this case, since the adjustment rod 54 cannot be moved in the axial direction with respect to the rod support 50, the screwing in or unscrewing is not possible. By returning the nut 121 to the adjustment rod 54
will be moved along.

As the nut 121 supported by the headlamp unit 2 is moved in the front-rear direction, the headlamp unit 2 is tilted downward on the road with the straight line connecting the points A and B as the center axis of rotation. , whereby the irradiation direction in the vertical direction is changed.

(d-8-b Leveling) Furthermore, when the motor 61 is rotated, the rod support body 50 and the adjustment rod 54 are moved in the front-back direction, so the nut 121 is moved in the front-back direction. The headlight unit 2 is tilted in the vertical direction. This is leveling adjustment.

(F-2, Second Embodiment) [Fig. 13] Fig. 13 shows a second embodiment of the tilting device for a vehicle headlamp according to the present invention.

The difference between the headlight device 122 shown in this second embodiment and the headlight device 1 shown in the first embodiment is the connection structure between the adjustment rod and the headlight unit, and the connection structure therebetween. Only the part that was Therefore, parts that are not different from the headlamp device 1 described above will be described by giving the same reference numerals to the same parts in the headlamp device 1 in the first embodiment. Omitted.

The usage of such codes is the same in the application examples described later.

Reference numeral 123 designates a synthetic resin receiver supported by a bracket 124 integrally formed with the lamp body 3, in which a spherical recess 125 facing rearward is formed.

Further, a dovetail hole 126 is formed through the center of the rod support 50.

Reference numeral 127 denotes an adjustment rod, which has a spherical body 128 formed at its front end, a rear end 129 formed into a non-cylindrical shape, and most of the remainder 130 formed into a helical shaft.
is screwed into the dovetail hole 126 of the aperture support 50, the rear end 129 is slidably inserted into the hole 115 of the adjustment rod rotor 113 of the aiming operating mechanism 102, and the sphere 128 is inserted into the above-mentioned receiver. It is rotatably fitted into a spherical recess 125 of the body 123.

Therefore, the operating shaft 108 of the aiming operating mechanism 102
When the adjustment rod 127 is rotated, the adjustment rod 127 is screwed in or unscrewed from the rod support 50 and moves in the axial direction, so the receiver 123 is moved approximately in the front-rear direction, and thereby the headlight unit 2 is tilted downwards on the road, and the irradiation direction is changed.

Note that leveling is performed in the same manner as in the first embodiment.

(F-3 Application Example) [Figures 14 and 15] Figures 14 and 15 are Application Example 13 of the tilting device for vehicle headlights of the present invention.
1. The headlight device 131 shown in this application example is a so-called movable reflector type headlight device, that is, a reflector rotatably supported by a lamp body is used as a tilting member, and this reflector is moved relative to the lamp body. This is a headlamp device of a type that changes the irradiation direction by tilting the headlamp, and differs from the headlamp device 1 shown in the first embodiment only in this point.

Reference numeral 132 designates a headlight unit, which is made of synthetic resin and includes a lamp body 133 with an open front and the lamp body 1.
A lens 134 is attached to the lamp body 33 so as to cover the front opening thereof, and a reflecting mirror 1 is disposed within a lamp space 135 defined by the lamp body 133 and the lens 134.
36 and a light bulb 137 supported on the rear top of the reflector 136
It consists of a lamp body 133 or a lamp housing 7.
Fixed.

The reflecting mirror 136 is supported by the lamp body 133 at three points A, B, and C shown in FIG. 14, and one of these three points A, B, and C, point A, is a pivot point. This rotation fulcrum portion is constituted by, for example, a ball joint-shaped support means. The other two support points B and C are adjustment parts where the distance between the reflector 136 and the lamp body 133 is adjusted. The adjustment section is constituted by, for example, an adjustment mechanism similar to the aiming adjustment mechanism 13 shown in the first embodiment.

Further, the adjustment section at the 0 point is constituted by the above-mentioned tilting device 21, and in this application example, the tilting device 21
is attached to the upper end of the rear surface of the lamp body 133, and the front end of the adjustment rod 54 is screwed into a nut 139 supported by a bracket 138 projecting from the reflector 136.

Therefore, when the operating member of the aiming adjustment section at point B is operated, the reflecting mirror 136 is tilted approximately in the left and right directions with the straight line connecting point A and point 0 as the center axis of rotation. When the operating shaft 108 is rotated or the motor 61 is rotated, it is tilted downward on the road with the straight line connecting points A and B as the center axis of rotation. In this way, the direction of irradiation is changed.

(G Effect of the Invention) As is clear from the above description, the tilting device for a vehicle headlamp of the present invention has a tilting member that is tilted when changing the irradiation direction, and the front end portion An adjustment rod connected to a member, a rod support that supports the adjustment rod, a drive unit that moves the rod support in the front-rear direction, a circuit board, and a circuit on the circuit board that adjusts the position of the adjustment rod. A tilting device for a vehicle headlamp, comprising a rotation sensor for cooperative detection, the rotation sensor is arranged coaxially with an adjustment rod, the tilting device has a substantially cylindrical shape, and has a side surface at the base end. A sensor is disposed in a rotatable manner on the outside of a clip body which is provided with an overhanging part and whose tip part has elasticity to bend in a direction perpendicular to the axial direction, and the tip part of the clip body is attached to a circuit board. The sensor is held in a clamp-like manner by the circuit board and the protrusion by being engaged with the mounting hole, and the adjustment rod is inserted through the clip body.

Therefore, according to the tilting device for a vehicle headlamp of the present invention, the rotation sensor can be assembled in advance to the circuit board as one unified block via the clip body, regardless of the number of components composing the rotation sensor. Therefore, the relative positional relationship of each part is always regulated to be constant, the positional relationship is highly accurate, and the assembly work can be performed extremely easily.

[Brief explanation of the drawing]

1 to 12 show a first embodiment of a tilting device for a vehicle headlamp according to the present invention, in which FIG. 1 is an enlarged sectional view of the main part, FIG. 2 is a front view, and FIG. The figure is III-I in Figure 2.
4 is a sectional view taken along the line IV--IV in FIG. 2, FIG. 5 is a sectional view taken along the line V-V in FIG. 2, and FIG. 6 is an enlarged rear view of the tilting device. Figure 7 is the ■ of Figure 6.
8 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 9 is an enlarged longitudinal sectional view showing the main parts of the tilting device,
Figure 10 is an enlarged end view taken along line X-X in Figure 1;
The figure is an exploded perspective view of the tilting device, FIG. 12 is an exploded perspective view showing the main parts of the tilting device from a different side than FIG. 11, and FIG. 13 is a second embodiment of the tilting device for a vehicle headlamp according to the present invention. FIGS. 14 and 15 are cross-sectional views of essential parts showing an example of the application of the tilting device for a vehicle headlamp according to the present invention. FIG. 14 is a front view, and FIG. FIG. 16 is a sectional view taken along the line XV-XV, and is a sectional view showing an example of a conventional tilting device for a vehicle headlamp. Explanation of symbols 1...Vehicle headlight, 2...Tilt member (headlight unit), 21...Tilt device, 50...Rod support, 54...Adjustment rod, 61. 65.66.70... Drive unit, 74...
・Circuit board, 75...Mounting hole, 80...Rotation sensor, 90...Clip body, 92...Protrusion part, 95...
... Tip part, 5 days... Middle part (of the adjustment rod), 121 ... Nut, 122 ... Vehicle headlight, 127 ... Adjustment rod, 128 ... (Of the adjustment rod) Front end, 130...
Middle part (of the adjustment rod), 131...Vehicle headlight, 136...Tilt member (reflector), 139...Natsuto Applicant: Yuji Komatsu, Patent Attorney, Koito Seisakusho Co., Ltd. 3Ll+l
C) C) ('J Ll" 1 Steller's ■■■

Claims (3)

[Claims] (1) an adjustment rod having a tilting member that is tilted when changing the irradiation direction, the front end of which is connected to the tilting member;
A rod support supporting the adjustment rod, a drive unit for moving the rod support in the front and back direction, a circuit board, and a rotation for detecting the position of the adjustment rod in cooperation with the circuit on the circuit board. A tilting device for a vehicle headlamp, the rotation sensor being disposed coaxially with an adjustment rod, the tilting device having a substantially cylindrical shape and having a protrusion extending laterally at the base end. The sensor is mounted on a clip body whose tip part has elasticity to bend in a direction perpendicular to the axial direction, and the sensor is rotatably disposed on the outside of the clip body, and the tip part of the clip body is engaged with the mounting hole of the circuit board. A tilting device for a vehicle headlight, characterized in that a circuit board and an overhanging portion hold the headlight in a clamp-like manner, and an adjustment rod is inserted through the clip body. (2) The adjustment rod is characterized in that its intermediate portion is supported rotatably and immovably in the axial direction in the hole of the rod support, and its front end is screwed into a nut supported by the tilting member. A tilting device for a vehicle headlamp according to claim 1 (3) The front of a vehicle according to claim 1, wherein the adjustment rod has an intermediate portion screwed into the rod support and a front end portion connected to the tilting member in a ball joint shape. Light tilting device